Configuring RH8 to use an ADSL Modem/Router
Graeme Nichols
gnichols at tpg.com.au
Wed Jun 2 02:53:02 UTC 2004
On Wed, 2004-06-02 at 04:07, Rick Stevens wrote:
> Graeme Nichols wrote:
<snip>
> >
> > Thank you for your help.
>
> Looks like there's lots of help here, but there are several things that
> must be set up for DHCP stuff to work. It's easiest to use the
> "redhat-config-network" tool to set these up, but should you wish to do
> it manually, the files that are affected are:
>
> /etc/sysconfig/network:
>
> HOSTNAME=your.host.name
> NETWORKING=yes
>
> /etc/sysconfig/network-scripts/ifcfg-eth0:
>
> DEVICE=eth0
> BOOTPROTO=dhcp
> ONBOOT=yes
>
> /etc/dhclient/dhclient.conf
>
> timeout 60;
> retry 60;
> reboot 10;
> select-timeout 5;
> initial-interval 2;
>
> interface "eth0" {
> request subnet-mask, broadcast-address, routers;
> request domain-name-servers;
> require subnet-mask, routers, domain-name-servers;
> }
>
> Since DHCP requires the help of a DHCP client program (under RH8.0 and
> 9, this is "dhclient"), you must set up the dhclient.conf file as I show
> above. Your router must also have its DHCP server bit enabled. The
> dhclient program actually fetches the IP address, netmask, default route
> and DNS server data and applies it.
>
> If you want to manually set up a fixed IP address, you need to tweak
> three files:
>
> /etc/sysconfig/network:
>
> HOSTNAME=your.host.name
> NETWORKING=yes
> GATEWAY=192.168.0.254 (the LAN address of your router)
>
> /etc/sysconfig/network-scripts/ifcfg-eth0:
>
> DEVICE=eth0
> BOOTPROTO=static
> ONBOOT=yes
> IPADDR=192.168.0.1 (or choose one from .1 to .253, inclusive)
> NETMASK=255.255.255.0 (choose one as appropriate)
> NETWORK=192.168.0.0 (OPTIONAL -- you really don't need this)
> BROADCAST=192.168.0.255 (OPTIONAL -- you really don't need this)
>
> /etc/resolv.conf:
> nameserver IPaddress-of-a-DNS-server
> nameserver IPaddress-of-a-second-DNS-server (OPTIONAL)
> nameserver IPaddress-of-a-third-DNS-server (OPTIONAL)
>
> The "IPaddress-of-a-DNS-server" should be the IP address(es) of your
> ISP's DNS server(s). These should NOT be addresses in the 192.168
> network.
>
> To verify that things are set up correctly (regarless of static or DHCP
> address settings), you should be able to:
>
> ifconfig eth0
>
> and see an address in the 192.168.0.something range. It should be "UP"
> and have a reasonable netmask. Next,
>
> netstat -rn
>
> should show a line such as:
>
> 0.0.0.0 192.168.0.254 0.0.0.0 UG 0 0 0 eth0
>
> The important bit is the "UG", which indicates your default gateway, and
> that "192.168.0.254" is the gateway itself. Finally, take a look at
> /etc/resolv.conf. If things are correct, it should have one or more
> "nameserver" lines with the IP addresses of the DNS servers you'll use
> (yes, dhclient will rewrite this file if you use DHCP).
>
> If that's all good, you should be able to "dig some-site-name" and get
> the IP address of the site (proves that DNS is working), and you should
> be able to ping both your router's LAN IP (in this case, 192.168.0.254)
> AND it's WAN interface (you'll need to check which address that is with
> your router). You can also verify the NAT mechanism by visiting:
>
> http://www.rhil.net/fancywhatip.html
>
> That page will show you which IP you're coming from (it should match the
> WAN address of your router).
> ----------------------------------------------------------------------
> - Rick Stevens, Senior Systems Engineer rstevens at vitalstream.com -
> - VitalStream, Inc. http://www.vitalstream.com -
> - -
> - Which is worse: ignorance or apathy? I don't know. Who cares? -
> ----------------------------------------------------------------------
>
>
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>
Hi Rick, Everything seems to be working just fine. I didn't set up DHCP
but everything else is as you said. I sent an email to you and the
mailing list asking about a couple of other things I need your expertise
on. I hope I'm not being too much of a nuisance.
Thank you very much for all your help in this matter.
--
Kind regards,
Graeme Nichols
Public Key available from http://keyserver.kjsl.com:11371/#extract
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